RD Carbon Film Resistors
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RD Carbon Film Resistors

RD Carbon Film Resistors Features: 1. Pure carbonhydric on ceramic cores. 2. Low cost. 3. Good quality and reliability. 4. Provide flameproof type, RDN.

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Product Description

RD Carbon Film Resistors



Products 

RD Carbon Film Resistors

Features

1. Pure carbonhydric on ceramic cores.

2. Low cost.

3. Good quality and reliability.

4. Provide flameproof type, RDN.




Electrical And Mechanical Performance of RD Carbon Film Resistors:


Characteristics

Standards

Test Methods

Resistance Tolerance

±5%(J)or ±2%(G)

-

Resistance Temp. Coeff.

0~-1300 ppm /°C

-55°C ~ 155°C

Power Rating Load

Surface temp,235°C Max.△R/R≤±1%

Rated voltage for 30 minutes

Short Time Overload

±1%

2.5 times of rated valtage for 5 seconds.

Dielectric Withstanding Voltage

No evidence of mechanical damage or insulation breakdown.

 

Max. Overload Voltage for 1 min.( RDN 1 W & 2 W  :AC 350V )

Insulation Resistance

10,000MΩ

DC 100V or 500V megger

Terminal Strength

No evidence of mechanical damage.

< 1/4W : 1 kg

> 1/2W : 1.5 kg

Solder-ability

Minimum95%coverage

235±5°C for 2 seconds

Resistance to 

Soldering Heat

No evidence of mechanical damage.△R/R≤ ± 1 %

270±5°C for 10 ±1 seconds

350±10°C for 3.5 ±0.5 seconds




Environmental Characteristics of RD Carbon Film Resistors:


Characteristics

Standards

Test Methods

Temp. Cycle

△ R/R≤±1%

-55°C( 30 min.) —► Room Temp.( 3 min.) —►+155°C(30 min.)

—► Room Temp.( 3 min.)/( 5 cycles)

Load Life

△R/R≤±5%

Rated power load 90 minutes ON 30 minutes OFF

70°C 1000 hours

Moisture-proof Load Life

△R/R≤±5%

Rated power load 90 minutes ON 30 minutes OFF

40°C95%RH500 hours

Nonflammability

not flamed

16 times of rated wattage for 5 min.




Dimensions of RD Carbon Film Resistors:


Rated Wattage

D±1

L±1

H±3

d±0.1

Resistance Range(Ω)

Max. Working Voltage

RD 1/8W,

1/6W(1/4WS)

1.7±0.2

3.7max.

28

0.45

3.9~4.7M

200V

RD 1/4W(1/2WS)

2.4± 0.5

6.4

28

0.6

3.9~10M

250V

RD 1/2W

3.5

9

28

0.65

3.9~10M

350V

RDN 1W

4.5

11

28

0.8

3.9~10M

500V

RDN 2W

5.0

15

28

0.8

3.9~10M

750V


RD Carbon Film Resistors factory




Derating Curve of RD Carbon Film Resistors:


For resistors operated in ambient temperatures above 70°C ,power rating must be derated in accordance with the curve  below.


RD Carbon Film Resistors factory




Surface Temperature Rise of RD Carbon Film Resistors:


RD Carbon Film Resistors factory





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